73222472421 has 44 divisors (see below), whose sum is σ = 125524238432. Its totient is φ = 41841412812.

The previous prime is 73222472413. The next prime is 73222472443. The reversal of 73222472421 is 12427422237.

73222472421 is a `hidden beast` number, since 7 + 3 + 2 + 224 + 7 + 2 + 421 = 666.

It is an ABA number since it can be written as A⋅B^A, here for A=7, B=27.

It is not a de Polignac number, because 73222472421 - 2³ = 73222472413 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73222472021) by changing a digit.

It is a polite number, since it can be written in 43 ways as a sum of consecutive naturals, for example, 10460353200 + ... + 10460353206.

Almost surely, 2^73222472421 is an apocalyptic number.

It is an amenable number.

73222472421 is a deficient number, since it is larger than the sum of its proper divisors (52301766011).

73222472421 is an frugal number, since it uses more digits than its factorization.

73222472421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70 (or 10 counting only the distinct ones).

The product of its digits is 75264, while the sum is 36.

Adding to 73222472421 its reverse (12427422237), we get a palindrome (85649894658).

The spelling of 73222472421 in words is "seventy-three billion, two hundred twenty-two million, four hundred seventy-two thousand, four hundred twenty-one".